Re: [ferret_users] time axis starting with December

["Ansley C. Manke" <ansley.b.manke@xxxxxxxx>]

Hi Pratik,

Ferret always has a set of monthly and seasonal time axes defined, but in addition there are some specialized modulo-calendar time axes defined in  these datasets.  See

https://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/Grids-Regions/GRIDS#Chapter4-Modulo_regridding

The datasets are,

clim_axes_gregorian.nc, clim_axes_julian.nc, clim_axes_noleap.nc

These define monthly climatologies, as well as seasonal climatologies centered on different months.  So for the default Gregorian calendar, use clim_axes_gregorian.nc.

yes? use clim_axes_gregorian
           *** NOTE: regarding /home/users/tmap/ferret/linux/fer_dsets/data/clim_axes_gregorian.nc ...
           *** NOTE: GREGORIAN climatological axes defined

yes? ! Clean up by canceling this dataset. Axis definitions persist even when a dataset is closed.

yes? cancel data clim_axes_gregorian 

yes? ! Show all the defined axes.  The clim_axes_gregorian  defines the  _GRG ones
yes?  show axis/all
 name       axis              # pts   start                end
 MONTH_IRREG TIME              12mi   16-JAN 12:00         15-DEC 17:49
 MONTH_REG TIME                12mr   16-JAN 06:00         16-DEC 01:20
 SEASONAL_REG TIME              4mr   15-FEB 15:43         15-NOV 14:05
 MONTH_GREGORIAN TIME          12mi   16-JAN 12:00         15-DEC 17:49
 MONTH_NOLEAP TIME             12mi   16-JAN 12:00         16-DEC 12:00
 MONTH_360_DAY TIME            12mr   16-JAN 00:00         16-DEC 00:00
 MONTH_ALL_LEAP TIME           12mi   16-JAN 12:00         16-DEC 12:00
 MONTH_JULIAN TIME             12mi   16-JAN 12:00         15-DEC 18:00
 ABSTRACT                99999999 r   1                    1.E+08
 EZ                         20480 r   1                    20480
 MON_IRREG_GRG TIME            12mi   16-JAN 12:00         16-DEC 17:49
 JFM_IRREG_GRG TIME             4mi   15-FEB 02:54         16-NOV 05:49
 DJF_IRREG_GRG TIME             4mi   15-JAN 08:43         16-OCT 23:38
 NDJ_IRREG_GRG TIME             4mi   17-DEC 05:49         16-SEP 11:38
 MON_REG_GRG TIME              12mr   16-JAN 05:14         17-DEC 00:34
 JFM_REG_GRG TIME               4mr   15-FEB 15:43         16-NOV 14:05
 DJF_REG_GRG TIME               4mr   16-JAN 11:03         17-OCT 09:25
 NDJ_REG_GRG TIME               4mr   17-DEC 00:34         16-SEP 22:56

yes? let monthave = temp[gt=djf_irreg_grg]
yes? list monthave
             VARIABLE : TEMP[GT=DJF_IRREG_GRG]
             FILENAME : coads_climatology.cdf
             FILEPATH : /home/users/tmap/ferret/linux/fer_dsets/data/
             SUBSET   : 4 points (TIME)
             LONGITUDE: 99E
             LATITUDE : 1S
                    99E  
                    40
 15-JAN      / 1:  28.56
 16-APR      / 2:  29.06
 17-JUL      / 3:  28.90
 16-OCT      / 4:  28.48

On 10/6/2019 10:12 PM, Pratik wrote:

Dear All

I'm plotting seasonal average SST. Here I have picked traditional seasons as DJF, MAM, JJA, SON.

!seasonal average 

use coads_climatology

let temp = SST[x=100,y=0]

let monthav = temp[l=@sbx:3]

let season = monthav[l=1:10:3]

!4 seasons DJF, MAM, JJA, SON

plot/col=0 temp

plot/step/ov season

go bar_chart3 poly/over season season

But here I'm missing values over December. I would like to define a time axis starting with December (Not with January). I tried regridding in time axis, But I couldn't get it. 

Best Regards
Pratik